* {
    margin: 0;
    padding: 0；
}

main {
    width: 100%;
    min-width: 960px;
    position: relative;
}

.box {
    width: 960px;
    height: 600px;
    margin: 100px auto 0;
    overflow: hidden;
}

.boxs {
    height: 600px;
    font-size: 0px;
    transition: all 0.6s;
    position: relative;
}

.bimg {
    width: 960px;
    height: 600px;
    display: inline-block;
}

.choose {
    height: 20px;
    width: 100%;
    text-align: center;
    position: absolute;
    top: 550px;
}

.chooseSpan {
    display: inline-block;
    width: 20px;
    height: 20px;
    margin: 0 10px;
    border-radius: 50%;
    background: white;
}

.mobile {
    width: 960px;
    height: 40px;
    margin: 0 auto;
    transform: translateY(-300px);
}
.mobile > button {
    width: 45px;
    height: 40px;
    line-height: 40px;
    background-color: rgba(253,150,74,0.7);
    display: block;
    text-align: center;
    font-size: 40px;
    font-weight: 800;
    color: #fee2cd;
    cursor: pointer;
    border: #fee2cd 1px solid;
    outline: none;
}

.mobile-left {
    float: left;
    border-radius: 0 20px 20px 0;   
}
.mobile-right {
    float: right;
    border-radius: 20px 0 0 20px;
}